EESA06H3 Lecture 2: EESA06 Lecture 2 Notes – Continental drift vs
9 Oct 2017
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In the mid-60s geophysics the ability to map remotely what was underneath the oceans and underground using electromagnetic waves: using sound as it reverberates back to see how far things were. Tuzo wilson: pt: it was the plates that were moving (new idea, he said the difference b/w cd and pt. Matching rock types: wegener looked @ rock types of the same age on the different continents as evidence. In order for salt to form you need marine sediment and a lot of evaporation. If you rearrange the continents, all the different climates make sense. It is (cid:374)ot the (cid:272)li(cid:373)ate that has (cid:272)ha(cid:374)ged, (cid:271)ut the (cid:272)o(cid:374)ti(cid:374)e(cid:374)t"s location. Fossils: showed evidence that related animals that were found on different continents. Continental ice sheet: our natural state in ontario is to be under ice, was around 20,000 years ago, at the bottom of the ice sheet, it scrapes the rock bed creating striations.
